A battery pack bottom needle test device

Abstract

The application relates to the technical field of battery pack testing, in particular to a battery pack bottom needling testing device, which comprises a top plate for mounting a battery pack and a positioning laser for mounting at the bottom of the battery pack, a movable bottom plate is arranged below the top plate, walking wheels driven by a walking motor are arranged on the lower surface of the bottom plate, a light source receiver matched with the positioning laser is arranged on the upper surface of the bottom plate, the light source receiver is electrically connected with the walking motor, and a needling needle for needling the bottom of the battery pack is arranged on the upper surface of the bottom plate. The movement of the bottom plate is controlled through cooperation of the light source receiver and the positioning laser, so that automatic positioning of the bottom plate and the needling needle is realized, positioning precision is guaranteed, and the operation risk of an operator is reduced.

Description

Technical Field

[0001] This application relates to the technical field of battery pack testing, and in particular to a needle penetration test device for the bottom of a battery pack. Background Technology

[0002] A battery pack, also known as a battery module, is a battery assembly consisting of multiple lithium-ion cells connected in parallel and series. During the production of a battery pack, a nail penetration test is performed on its bottom. The purpose of this test is to evaluate the battery pack's reaction and performance when punctured by a sharp object. By simulating abuse scenarios under extreme conditions, the safety performance of the battery pack can be effectively assessed, providing a reliable guarantee for the development of electric vehicles.

[0003] To conduct bottom needle penetration and bottom impact tests on battery packs, test points need to be marked on the bottom of the sample, and the center of the needle penetration and impact equipment needs to be aligned with the test points before the experiment can be carried out.

[0004] Existing needle penetration testing equipment is typically aligned manually, with operators aligning the needle with the test point on the bottom of the battery pack. This manual alignment is inaccurate, and there are safety hazards associated with workers performing the alignment at the bottom of the battery pack. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a needle penetration testing device for the bottom of a battery pack.

[0006] The battery pack bottom needle penetration test device provided in this application adopts the following technical solution:

[0007] A battery pack bottom needle penetration test device includes a top plate for mounting the battery pack and a positioning laser for mounting on the bottom of the battery pack. A movable base plate is provided below the top plate. The lower surface of the base plate is provided with a walking wheel driven by a walking motor. The upper surface of the base plate is provided with a light source receiver that cooperates with the positioning laser. The light source receiver is electrically connected to the walking motor. The upper surface of the base plate is provided with a needle for penetrating the bottom of the battery pack.

[0008] By adopting the above technical solution, the battery pack is placed below the top plate, and a positioning laser is installed at the bottom of the battery pack to emit a positioning laser. A light source receiver on the base plate receives the laser emitted by the positioning laser, ensuring that the light intensity received by the receiver is always at its maximum. Thus, while searching for the laser, the light source receiver controls the start of the walking motor, thereby moving the entire base plate to maintain maximum light intensity. When the light source receiver is directly aligned with the positioning laser, the light intensity received by the receiver reaches its maximum, at which point the base plate stops moving. A needle puncture experiment was conducted on the battery pack. By coordinating the light source receiver and the positioning laser to control the movement of the base plate, automatic positioning of the base plate and the needle is achieved, ensuring positioning accuracy and reducing the operational risks for workers.

[0009] Preferably, the base plate is provided with a rotating rod controlled by a rotating motor, the light source receiver is installed at the upper end of the rotating rod, and the rotating motor is electrically connected to the light source receiver.

[0010] By adopting the above technical solution, the light source receiver is installed on the rotating rod. The light source receiver can rotate to locate the laser emitted by the positioning laser, and control the rotation motor by controlling the light intensity, thereby controlling the rotation angle of the rotating rod. The light source receiver has a wider receiving range and a wider range of applications.

[0011] Preferably, the device also includes a needle-piercing positioning component installed at the bottom of the battery pack, wherein the positioning laser is detachably connected to the needle-piercing positioning component, and the base plate is provided with a disassembly component for disassembling the positioning laser.

[0012] By adopting the above technical solution, the positioning laser and the needle positioning component can be detachably connected. When the light source receiver and the positioning laser are aligned, the detaching component first removes the positioning laser, and then the needle performs a needle puncture test on the battery pack. In this way, the positioning laser can be reused multiple times to prevent the battery pack from spontaneously combusting and damaging the positioning laser during the experiment.

[0013] Preferably, the needle positioning component includes a magnetic ring, and the positioning laser is connected to the magnetic ring by magnetic attraction. The disassembly component includes a magnetic component installed on the upper end of the rotating rod, and the maximum magnetic force between the magnetic component and the positioning laser is greater than the magnetic force between the positioning laser and the magnetic ring.

[0014] By adopting the above technical solution, the positioning laser is connected to the magnetic ring via magnetic attraction. The magnetic force of the magnetic component is stronger than that of the magnetic ring, allowing the magnetic component to attract the positioning laser off the magnetic ring, thus removing the positioning laser. This installation and disassembly method is relatively simple and convenient.

[0015] Preferably, the magnetic component is an electromagnet.

[0016] By adopting the above technical solution, both the magnetic component and the light source receiver are mounted on the rotating rod. To prevent the magnetic component from prematurely attracting the positioning laser and affecting the positioning accuracy, the magnetism of the magnetic component is controlled by electricity. Before the light source receiver is accurately positioned, the electromagnet is not energized, and the magnetic component has no magnetism, so it will not attract the positioning laser. Moreover, the strength of the electromagnet's magnetic force is controlled by electricity, making it more convenient to use.

[0017] Preferably, the base plate is provided with a vertically arranged lifting cylinder, the upper end of the lifting cylinder is provided with a support plate, and the rotating rod is mounted on the support plate.

[0018] By adopting the above technical solution, after the light source receiver and the positioning laser are aligned, the lifting cylinder pushes the rotating rod to rise, the magnetic component is aligned with the positioning laser, and after the magnetic component is energized, it attracts the positioning laser and removes the positioning laser.

[0019] Preferably, a switching plate is horizontally rotatably connected to the base plate, the lifting cylinder is installed on the switching plate, and the needle is vertically installed on the switching plate via a needle-piercing cylinder. The straight line between the needle-piercing cylinder and the lifting cylinder passes through the center of the switching plate, and the distance between the needle-piercing cylinder and the center of the switching plate is equal to the distance between the lifting cylinder and the center of the switching plate.

[0020] By adopting the above technical solution, after the positioning laser is removed, only the magnetic ring remains on the battery pack, with the center of the magnetic ring serving as the test point. At this time, the switching disk rotates 180°, exchanging positions with the needle-piercing cylinder and the lifting cylinder. The needle-piercing cylinder is now positioned where the lifting cylinder originally was. The needle and the center of the magnetic ring are now directly aligned, and the needle penetrates the center of the magnetic ring deep into the output shaft of the needle-piercing cylinder to perform a needle-piercing experiment on the battery pack. Through the switching disk setting, the light source receiver is precisely positioned and its position is switched with that of the needle, thus ensuring the positional accuracy of the needle and making it convenient to use.

[0021] Preferably, the base plate has a switching gear controlled by a switching motor that rotates horizontally, and the outer wall of the switching disk has a switching groove that meshes with the switching gear.

[0022] By adopting the above technical solution, the switching motor controls the rotation of the switching gear, thereby driving the switching disc to rotate, which is convenient to use.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. It solves the problems of unsafety, inconvenience, slowness, and inaccuracy when using manual alignment at the bottom of the battery pack;

[0025] 2. This solves the problem that when using image recognition or other equipment for alignment, an additional strong light source is required, and the test device needs to be replaced on-site after alignment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0027] Figure 2 yes Figure 1 Enlarged diagram of section A in the middle;

[0028] Figure 3 This is a schematic diagram of the structure of the upper surface of the base plate in the embodiment.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Top plate; 2. Positioning laser; 3. Base plate; 4. Walking wheels; 5. Walking motor; 6. Light source receiver; 7. Needle; 8. Rotating rod; 9. Rotating motor; 10. Magnetic ring; 11. Magnetic component; 12. Lifting cylinder; 13. Support plate; 14. Switching disc; 15. Needle cylinder; 16. Switching gear; 17. Switching tooth groove; 18. Switching motor. Detailed Implementation

[0031] The present application will now be described in further detail with reference to all accompanying drawings.

[0032] Example

[0033] This application discloses a needle penetration testing device for the bottom of a battery pack, referring to... Figures 1 to 3 It includes a top plate 1, a bottom plate 3, and a needle-piercing positioning component. The battery pack is installed at the bottom of the top plate 1, and the needle-piercing positioning component is fixed at the test point at the bottom of the battery pack for positioning and needle-piercing tests.

[0034] Reference Figures 1 to 3 The needle-punch positioning component includes a magnetic ring 10, the center of which is the test point of the battery pack. A positioning laser 2 is magnetically mounted on the lower surface of the magnetic ring 10, emitting a laser for precise positioning.

[0035] Reference Figures 1 to 3A light source receiver 6, which works in conjunction with the positioning laser 2, is mounted on the upper surface of the base plate 3. The light source receiver 6 receives the laser emitted by the positioning laser 2. The lower surface of the base plate 3 is equipped with wheels 4 driven by a walking motor 5. The light source receiver 6 and the walking motor 5 are electrically connected via a controller. The light source receiver 6 must ensure that the received laser light intensity is at its maximum. Thus, when the light source receiver 6 receives the edge of the laser beam, it will control the walking motor 5 to start, thereby driving the entire base plate 3 and the light source receiver 6 to move horizontally, gradually moving the light source receiver 6 towards the center of the laser beam until it is vertically aligned with the positioning laser 2. At this point, the laser intensity received by the light source receiver 6 reaches its maximum, and the base plate 3 stops moving, thus completing the positioning process.

[0036] Reference Figures 1 to 3 A switching disk 14 is horizontally rotatably connected to the base plate 3, and the axis of the switching disk 14 is vertically set. A lifting cylinder 12 is vertically fixed on the switching disk 14, and a support plate 13 is fixed to the top of the lifting cylinder 12. A rotating rod 8 is rotatably connected to the upper end of the support plate 13, and a rotating motor 9 for controlling the rotation of the rotating rod 8 is installed on the support plate 13.

[0037] Reference Figures 1 to 3 The light source receiver 6 is mounted on the upper end of the rotating rod 8, and the light source receiver 6 is electrically connected to the rotating motor 9 via a controller. The rotating rod 8 rotates, thereby adjusting the receiving angle of the light source receiver 6, increasing the receiving range of the light source receiver 6 for the laser. Moreover, as the intensity of the laser received by the light source receiver 6 varies, the light source receiver 6 controls the rotating motor 9 via the controller, thereby changing the angle of the rotating rod 8. Finally, the rotating rod 8 is in a vertical state, directly facing the positioning laser 2.

[0038] Reference Figures 1 to 3 The rotating rod 8 is equipped with a disassembly mechanism for removing the positioning laser 2. This mechanism includes a magnetic component 11, which is an electromagnet, mounted on the rotating rod 8. The maximum magnetic force between the magnetic component 11 and the positioning laser 2 is greater than the magnetic force between the positioning laser 2 and the magnetic ring 10. After the light source receiver 6 is aligned with the positioning laser 2, the lifting cylinder 12 is activated. The upper end of the rotating rod 8 contacts the positioning laser 2, energizing the magnetic component 11. The magnetic component 11 generates a magnetic force greater than that of the magnetic ring 10. At this point, the positioning laser 2 is attracted to the rotating rod 8, and the output shaft of the lifting cylinder 12 descends, thereby removing the positioning laser 2 from the magnetic ring 10. Only the magnetic ring 10 remains at the bottom of the battery pack.

[0039] Reference Figures 1 to 3A needle-piercing cylinder 15 is vertically mounted on the switching disk 14, and a needle 7 for piercing the battery pack is fixed on the output shaft of the needle-piercing cylinder 15. The straight line between the needle-piercing cylinder 15 and the lifting cylinder 12 passes through the center of the switching disk 14, and the distance between the needle-piercing cylinder 15 and the center of the switching disk 14 is equal to the distance between the lifting cylinder 12 and the center of the switching disk 14. A switching gear 16 controlled by a switching motor 18 rotates horizontally on the base plate 3, and a switching groove 17 that meshes with the switching gear 16 is opened on the outer wall of the switching disk 14.

[0040] Reference Figures 1 to 3 After the rotating rod 8 removes the positioning laser 2, the switching motor 18 starts, and the switching disk 14 rotates 180°, thereby exchanging the positions of the needle piercing cylinder 15 and the lifting cylinder 12. At this time, the needle 7 is located at the original position of the rotating rod 8, and the needle 7 is directly opposite the center of the magnetic ring 10, which is the test point of the battery pack. The needle 7 is inserted into the battery pack deep into the output shaft of the needle piercing cylinder 15 to carry out the needle piercing test.

[0041] The implementation principle of the battery pack bottom needle penetration test device according to this application embodiment is as follows: The operator fixes the magnetic ring 10 at the test point of the battery pack, with the center of the magnetic ring 10 directly facing the test point. The positioning laser 2 is magnetically connected to the magnetic ring 10. The operator installs the battery pack at the top and bottom, with the positioning laser 2 facing downwards. The positioning laser 2 is activated to emit a positioning laser, and the light source receiver 6 locates and receives the laser. During the laser reception process, the light source receiver 6 must ensure that the received light intensity is maximized. According to the received light intensity, the light source receiver 6 controls the position of the rotating rod 8 and the base plate 3, continuously adjusting the position of the base plate 3 and the needle 7 until the rotating rod 8 is in a vertical state, and the light source receiver 6 and the positioning laser 2 are vertically aligned.

[0042] At this time, the output shaft of the lifting cylinder 12 extends, and the magnetic component 11 is energized to attract the positioning laser 2 from the magnetic ring 10. The output shaft of the lifting cylinder 12 retracts, the switching disk 14 rotates 180°, the needle 7 is aligned with the center of the magnetic ring 10, the output shaft of the needle-piercing cylinder 15 extends, and the needle 7 passes through the center of the magnetic ring 10 and pierces into the battery pack to conduct the experiment.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A needle penetration test device for the bottom of a battery pack, characterized in that: The device includes a top plate (1) for mounting a battery pack and a positioning laser (2) for mounting on the bottom of the battery pack. A movable base plate (3) is located below the top plate (1). The lower surface of the base plate (3) is provided with wheels (4) driven by a walking motor (5). The upper surface of the base plate (3) is provided with a light source receiver (6) that cooperates with the positioning laser (2). The light source receiver (6) is electrically connected to the walking motor (5). The upper surface of the base plate (3) is provided with a needle (7) for piercing the bottom of the battery pack. A rotating rod (8) controlled by a rotating motor (9) is located on the base plate (3). The light source receiver (6) is mounted on the upper end of the rotating rod (8). The rotating motor (9) is electrically connected to the light source receiver (6). The device also includes a mounting... The needle-piercing positioning component is located at the bottom of the battery pack. The positioning laser (2) is detachably connected to the needle-piercing positioning component. The base plate (3) is provided with a disassembly component for disassembling the positioning laser (2). The needle-piercing positioning component includes a magnetic ring (10). The positioning laser (2) is connected to the magnetic ring (10) by magnetic attraction. The disassembly component includes a magnetic component (11) installed at the upper end of the rotating rod (8). The maximum magnetic force between the magnetic component (11) and the positioning laser (2) is greater than the magnetic force between the positioning laser (2) and the magnetic ring (10). The base plate (3) is provided with a vertically arranged lifting cylinder (12). The upper end of the lifting cylinder (12) is provided with a support plate (13). The rotating rod (8) is installed on the support plate (13).

2. The battery pack bottom needle penetration test device according to claim 1, characterized in that: The magnetic component (11) is an electromagnet.

3. The battery pack bottom needle penetration test device according to claim 2, characterized in that: A switching disk (14) is horizontally rotatably connected to the base plate (3). The lifting cylinder (12) is installed on the switching disk (14). The needle (7) is vertically installed on the switching disk (14) through the needle-piercing cylinder (15). The straight line between the needle-piercing cylinder (15) and the lifting cylinder (12) passes through the center of the switching disk (14), and the distance between the needle-piercing cylinder (15) and the center of the switching disk (14) is equal to the distance between the lifting cylinder (12) and the center of the switching disk (14).

4. The battery pack bottom needle penetration test device according to claim 3, characterized in that: The base plate (3) has a horizontally rotating switching gear (16) controlled by a switching motor (18), and the outer wall of the switching disk (14) has a switching groove (17) that meshes with the switching gear (16).

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